The MITRE CVE dictionary describes this issue as:
GUI display truncation vulnerability in Mozilla Thunderbird 1.0.2, 1.0.6, and 1.0.7 allows user-assisted attackers to execute arbitrary code via an attachment with a filename containing a large number of spaces ending with a dangerous extension that is not displayed by Thunderbird, along with an inconsistent Content-Type header, which could be used to trick a user into downloading dangerous content by dragging or saving the attachment.
Find out more about CVE-2006-0236 from the
MITRE CVE dictionary dictionary and
NIST NVD.
Statement
Not vulnerable. We verified that this issue does not affect Linux versions of Thunderbird.